Improvement in valves for steam-engines



UNITED STATES PATENT OFFICE.

,JOHN II. REDSTONE AND ALBERT E. REDSTONE, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN VALVES FOR STEAM-ENGINES.

Specification ibrming part of Letters Patent No. 35,1712, dated Hay (i, 1869.

T0 all whom it muy col/00771,.:

Be it known that we, JOHN II. REDSTONE and ALBERT 'l 1.RE1' s'roNE,of Indianapolis, in the county ot Marion and State oi Indiana, have invented certain new and uset'ul Improvements in the Construction and Arrangement of Steain-Iilngines; and we do hereb)Y declare that the following is a li'ull and exact description ot the saine, reference being had to the accompanying drawings and the letters marked thereon.

Figure I is a section showing the steam* chest and cylinder longitudina-lly'through the l center. Fig. 2 is a top View ot the valve ot a single engine, designed to explain the position of the ports or steam-charmeIs shown in Fig. '1. l

A is a hollow rolling valve. 'lhe letters I), ll, C, and F show the ports and stcanl-space connected with the same.

.l-i is the lever which operates the Valve A, being operated by the connection-rod R.

The branch passages ll and I K and L conmiunicato with the cylinder-ports .I and M. The steam-pipe N comnulnicates with the steam-space C, as ind icatod by the dotted lines leading to the same.

G represents the escape-pipe attached to the .hollow valve A,

The operation ot' the engine is as follows: The steam being admitted through the supplypipe N enters the steam-space (i. The port E, being in communication with the branch passage L, conducts the steam to the cylin der-port M, and, acting upon the inner side of the piston-head O, forces the saine out, re volving the fly-wheel P, the exhaust escaping through the cylinderwport J, passage H, and escapepipe G, which are now in connection, as indicated by the dotted lines, showing the Valves E and F. The valve A being operated as the lever R is withdrawn by the action of the ily-wheel I, the Valve making one-fourth of a revolution, brings the port I. (shown in Fig. in communication with the branch passage II and the supply-port I) in con1- niunication with the passage L, thus opening the supply of the steam through the passage A I and cylinder-port .I to the outer side of the piston-head O, thereb \v perfecting the revolution ot' the iiy-wheel P. Fig. 3 shows the throttle ot' the double engine, and is also used to reverse the motion of the same, as will be shown. '.lhe steam entering the supply-pipe A to the steam-straw l, surroumling the valve th e connection is now shown as open through the valve C at the connection of the passa-ges I) and E, which will bc shown to communicate with the rolling Valves F and G (shown in Fig. vt) as follows: the valve (I resting upon the Valve-seat II, and the passages D and VE connecting with the steam-space surroululingthe rolling Valves Fand (i, while the passages .I and I( connect with the passage L and M,

which lead to the rolling valves F and G. In

the posit-ion in which thevalve F is shown iu Fig. i, with the position of the Valve C as in Fig. 3, the steam is admitted, as indicated by the dotted lines in the Valve to the passages L and M. The steam passes through the valve F to the cylinilenport N, while the exhaust passes through the port O to the steam-space surrounding the valve, as shown by the dotted lines, thence up the passage D (shown in Fig. 3) to the exhaust of the throttle C. The valve G is operated at a ditt'erence ot' one fourth ot' a revolution by the same process.

Fig. 5 is an under View of the cap of the steam-chest shown in the section, Fig. 3, and

shows the throttle-chamber, valve-cavities,

and steam-channels leading to the same. Figs. 6 and 7 are end sections, showing the valve ports and passages leading to the steam-space.

IVhatwe claim, and desire to secure by Letters Patent, is-

1. The hollow valve A, when constructed as set forth and-operated in connection with the steam-passages I-I I and K L.

2. The valves F and G, when constructed and operated as set forth.

JOHN H. REDSTONE. [n s] ALBERT E. REDSTONE. LL. s]

\Vit.nesses:

FRED. LANG,

GEORGE L. HERETH. 

